Welcome to HCM
We understand your concerns
From the description you gave, I assume that there is no itching, burning, fuming, reddishness or discolourtion, pricking etc. Assuming that it doesnot cause any irritability or unconfirtability to your private area, it appears to be a cyst
The viscous discharge is something you should worry about, because it points to pus cells. Pus cells means there is infection.
It is always better to consult a dermatologist
/ general physician to confirm.
Get well soon.